Ed's (almost natural...) food is the best--I've *never* seen fish hit it so quickly or seem happier eating it
I wish they carried it in every shop in the country. I really do.
Off the shelf, I've had good luck w/ Hikari for small wafers and betta food. I've tried OmegaOne b/c besides Ed's food, it's supposed to be closest to nature, but I never had any takers. I tried Aqueon and Tetra when I had goldfish, but they didn't care for either. Sushi nori was also panned. Other than that, San Francisco bay frozen products were a bit messy and received mixed reviews. Then there are treats--freeze-dried tubifex, bloodworms, brine shrimp...I think I used to do San Francisco bay on those, too--those, however, were always eaten with relish.